Geometrical OpticsEasy
Question
Which one of the following form(s) a virtual and erect image for allpositions of the objecte ?
Options
A.Convex lens
B.Concave lens
C.Convex mirror
D.Concave mirror
Solution
For a lens
ie,
For a concave lens f, and u are negative, i.e., v will always be negative and image will always be virtual.
For a mirror :
Here, f is positive and u is negative for convex mirror. Therefore, v is always positve and image is always virtual.
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